An average customer at Amazon apparently buys $600 worth of goods from them in a year so if they got 20 packages then yes this would be a 10% increase. However

An average customer at Amazon apparently buys $600 worth of goods from them in a year so if they got 20 packages then yes this would be a 10% increase. However I for example probably get 2 packages from them a month and a $6 monthly increase hardly seems important, if I leave a light on in my house for too long the increase in my electricity bill probably eclipses that. Depends on point of view I guess.